Stanford Research SR550 FET Voltage Preamplifier

Stanford Research SR550 FET Voltage Preamplifier The SR550 Voltage Preamplifier is designed to work with SRS lock-in amplifiers. Preamplifiers provide gain close to the experimental detector, before the signal-to-noise ratio is permanently degraded by cable capacitance and pickup. The SR550 minimizes noise and pickup in the connecting lines and reduces measurement time in noise-limited experiments. Power and control signals are brought from the lock-in by a 9-pin cable. The SR550 may also be operated independently by applying appropriate biasing (±20 VDC, +5 VDC). Features: 3.6 nV/√Hz Input Noise FET Input, 100 MΩ Input Impedance Gain of 1, 2, 5 or 10 Single-ended and Differential Inputs AC Coupled Input Powered by SRS Lock-in Amplifiers High Common Mode Rejection Please see Datasheet for complete details and specifications.